It doesn't need to be discussed, Dr. MacTaggert... he's asking us to become X-Men. Of course we'll do it. 
Appearing in 1st story
Featured Characters:
- X-Men (Main story and flashback)
- Dr. Moira MacTaggert (Only in flashback)
- Professor X (Charles Xavier) (Only in flashback)
- Sway (Suzanne Chan) (Only in flashback) (Joins)
- Petra (Only in flashback) (Joins)
- Darwin (Armando Munoz) (Flashback and merged within Vulcan in main story)
- Vulcan (Gabriel Summers) (Main story and flashback) (Appears as Kid Vulcan in flashback) (Joins)
Supporting Characters:
- X-Men (Main story and flashback)
- Beast (Hank McCoy)
- Wolverine (Logan)
- Nightcrawler (Kurt Wagner)
- Cyclops (Scott Summers) (Main story and flashback)
- Iceman (Bobby Drake) (Only in flashback)
- Marvel Girl (Jean Grey) (Only in flashback)
- Angel (Warren Worthington III) (Only in flashback)
- Marvel Girl (Rachel Grey)
- Dr. Moira MacTaggert (Only in flashback)
Antagonists:
- Krakoa (Only in flashback)
Other Characters:
- Magneto (Erik Magnus Lensherr) (Mentioned)
- Fantastic Four (Mentioned)
Races and Species:
Locations:
- Earth (Main story and flashback)
- North America (Main story and flashback)
- United States of America (Main story and flashback)
- New York (Main story and flashback)
- Queensbury (Main story and flashback)
- Muir-MacTaggert Research & Development (Main story and flashback)
- Danger Room (Mentioned)
- Queensbury (Main story and flashback)
- New York (Main story and flashback)
- United States of America (Main story and flashback)
- Pacific Ocean (Only in flashback)
- Krakoa (Only in flashback)
- Rome (Mentioned)
- North America (Main story and flashback)
Items:
- Wolverine's Suit
- X-Uniforms
- Cyclops' Visor (Main story and flashback)
Vehicles:
- Moira's jet
Synopsis for 1st story
- Synopsis not yet written
Appearing in "Kid Vulcan"
Featured Characters:
- Kid Vulcan (First appearance chronologically) (Main story and flashback)
Supporting Characters:
- Dr. Moira MacTaggert
- Dai'andral (Only in flashback) (First appearance; dies)
- Professor X (Charles Xavier) (Main story and flashback)
- Cyclops (Scott Summers) (Only in flashback)
Antagonists:
- Unnamed Shi'ar scientists and soldiers
- NYPD officers
- Sentinels (Appears on screen)
Other Characters:
- X-Men (Appears on screen)
- Marvel Girl (Jean Grey) (Appears on screen)
- Angel (Warren Worthington III) (Appears on screen)
Races and Species:
Locations:
- Earth (Main story and flashback)
- North America (Main story and flashback)
- United States of America (Main story and flashback)
- New York (Main story and flashback)
- Queensbury
- Unnamed hidden Shi'ar base (Only in flashback)
- New York City (Only in flashback)
- New York (Main story and flashback)
- United States of America (Main story and flashback)
- North America (Main story and flashback)
Items:
Synopsis for "Kid Vulcan"
- Synopsis not yet written
Notes
- Darwin's appearance in the present is as a being of pure energy fused with Vulcan. While he doesn't technically appear in the story, he is there.
- Vulcan is revealed to be the third Summers brother.